Duplex Printing - not all pages printed

I'm trying to print a duplex calendar on my HP B9180 printer. I've loaded the paper correctly and set up the printer properties as described, then selected all 12 months, even pages (pictures) to be printed. When I then press "print", it is outputting 3 pages correctly, then only about half of the 4th page, then stops. I haven't had this kind of problem with any other application using this printer, so I wondered if you have any suggestions please> Below is an extract from the calendar properties. Thanks

Duplex Printing - not all pages printed

Hi - this is likely to be a memory problem.
How much RAM and what version of Windows do you have>

If there are any other programs running simultaneously try clososing these down first. You can obviosly print pages one at a time but this is tedious. Another suggestion is to "Print to PDF" first, then use Adobe Reader to print result.